Door for railway hopper cars



Dec. 30, 1930. e. G. GILPIN DOOR FOR RAILWAY HOPPER CARS Filed Oct. 5, 1929 I M r Garlh 6'. 627 0137 Patented Dee;v 3Q; i930 GARTH G.

SPALLTQE Nrs orri cs GILPIN, OF RIVERSIDE,,ILLINOIS/ASSIGNOR TOlJ'NION. IlIETAL PRODUCTS COMPANSL'OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE DOOR EOR'BAILWAY HOPPER CARS Application filed October 5, 1929. Serial No. 397,592.

My invention relates to the construction of railway cars of the dumping or drop bottom type, such as hopper cars, hopper gondo-la cars, drop bottom or general servlce' gondola cars or the like,-having a door forming a part of the load retaining means, which door is provided with hinges adjacent one of its edges and is capable of being dropped or swung open to discharge the load. Any meansot raising the door to the closed position and any means'for looking and releasing the door may be employed with my door.

Though the door may be made of 2. rolled steel plate pressed to form between reciprocating dies, I prefer to make the door of cast metal because a better distribution of the metal: for strength requirements can be obtained without the use of separate fixtures,

and furthermore, cast metal has greater resistance to corrosion than rolled steel.

An ob ect of theinvention is to provide a door of cast metal formed and shaped so that it will not be deformed by warping when cooling, 'and'furthermore, will eliminate shrinkage, cracks and internal stresses.

Another obj ect of the invention is to reinforce a hopper car door in such a way to also increase the cubical capacity of the car.

Another object of the invention is to form the marginal portions of the door so as to obtain the maximum strength to'resist deflec tion of the door.

In the drawings: Fig. 1 shows a plan View of a typical doo incorporating my improvement.

F 2 is a section on line 22 of Fig. 1. Fig. 3 is a section on line 33 of Fig. 1. Fig. lis a side View of Fig. 1. Fig. 5 is a diagram described later.

The door comprises marginal portions 2v and a depressed portion 3 connected .by a preferably continuous web 4. This marginal portion is inclined downwardly toward the outer edges of the door.

.VVhen a load is imposed upon the central or depressed portion 3 of the door the stresses are transmitted through the web 4 to the marginal portion or flange 2 causing a tendency for the fiangeato deflect, and the object of this invention'is to so position this flange relative to the web so as to obtain the least tendency toward deflection, thereby obtaining the maximum strengthof the web and flange.

The proper angular relation between the flange and the web is obtained, as shown in marginal portion 2 is substantially parallel to a plane bisecting the angle between the plane of the depressed portion 3 and a plane normal to the web 4.

This device is an improvement upon the construction shown in my application Serial No. 392,632, filed September 14, 1929. p

The accompanying drawings illustrate the preferred form of the invention, though it is-tobe understood that the invention is not limited to the exact details of construction shown and described, as it is obvious that various modifications thereof, within the scope of the claims, will occur to persons skilled in the art.

I claim: 7

l. A hingeable door forming part of the load retaining means of a railway dump car comprising a marginal portion, adepressed portion in a spaced apart plane therefrom, and a web connecting said portions, said marginal portion being inclined downwardly toward theouter edges of the door.

2. A hinge-able door forming part of the load retaining means of a railway dump car comprising a marginalportion, a depressed portion in a spaced apart plane therefrom, andv an oblique Web connecting said portion said marginal portion being inclined downwardly toward the outer edges of the door. 3. A hingeable door forming part of the load retaining means of a railway dump car ,i comprising a marginal portion, a depressed portion in a spaced apart plane therefrom, and an oblique Web connecting said portions, said marginal portion being inclined downwardly toward the outer edges of the door, said marginal portion being substantially parallel to a plane obtained by bisecting the angle between the plane of the depressed portion and a plane normal to the Web.

GARTH G. GILPIN. 

